帮我检查英语试卷哪个错了,我交卷也没满分!

帮我检查英语试卷哪个错了,我交卷也没满分!
13.The problem is(A )by pollution.
A.caused
B.because
C.due
D.because of
14.Could you please pay me( D)advance?
A.不填
B.on
C.in
D.for
15.– Jack,are you leaving now?It's 7:20.– ( D).
A.Yes,it's still early
B.No,thirty minutes is enough
C.Yes,the bag is not ready
D.No,I'll set off in 30 minutes
16.I'm tired.I(D )working very hard.
A.have
B.am
C.had
D.have been
17.He asked me( A)English culture.
A.about
B.of
C.for
D.on
18.– Are you sure about that?– ( D).
A.You needn't worry about that
B.I like the idea
C.Oh,no.I'm afraid of that
D.Oh,yes.I'm absolutely positive
19.– The lecture given by professor Smith was really interesting.– ( A).
A.I couldn't agree with you more
B.I'm going to listen to it
C.It sounds reasonable
D.It didn't last too long
20.He goes to school by bike,and the( )takes half an hour.B
A.travel
B.journey
C.voyage
D.trip
21.( D)I got a first,I'd stay in university and I'd do a postgraduate research degree.
A.As
B.Since
C.When
D.If
22.– I don't like the sports programs on Sundays.– ( B).
A.So do I
B.Neither do I
C.So am I
D.Neither am I
23.Why( A)the old block of flats( )demolished next month?
A.are…being
B.is…being
C.has…been
D.have…been
24.Jean could be a very attractive girl,but she(C )to her clothes.
A.pays no attention
B.was paying no attention
C.paid attention
D.had paid attention

需要改的：
14 C
23 B
24 B
再问： 我比较纠结23,24，好几个说24应该选A，虚拟语气!
再答： 20 前面有说是D trip的觉得不对。trip带有娱乐性质比如school trip、trip to New York；而journey专指从某地到另外一地故journey是对的
23 block of flat是单数所以用B。前面有人说用B，因为a group of ...可以用作单数也可以是复数，但block of flat这一个组合是固定的单数词，故不能用C
24 could有两个用法，一个是虚拟语气一个作为can的过去时态。不管是哪一个，后面都应填过去式即was